| 单词 | well drill |
| 释义 | > as lemmaswell drill well drill n. a drill designed for sinking wells; spec. a percussion drill. ΘΚΠ society > occupation and work > equipment > piercing or boring tools > [noun] > boring tool > for boring in the ground auger1532 borer1572 boring-rod?1677 wimble1693 well borer1780 rock drill1836 miser1842 bore-rod1849 header1863 well drill1866 rig1875 well rig1875 trepan1877 broaching-bit1881 heading machine1897 1866 U.S. Patent 54,112 2/1 The nature of my said invention consists in a tubular rod for well-drills and pumps. 1938 N. A. Kessler Making Lime on Farm 3 Where quarry operations are on a large scale..well drills are used. Where operations do not warrant so large an investment, jackhammer drills are usually sufficient. 1963 L. F. Sheffy Francklyn Land & Cattle Company xxiii. 356 Another major factor in the process of transition was the new method for securing water with horse-drawn well drills. 2012 Sci. Total Environment 437 255/1 The scope of non-road machinery includes construction equipment, industrial well drills, [etc.]. < as lemmas |
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